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Energy and Exergy Analysis of a Turbocharged Three-Cylinder Spark Ignition Engine and the Use of a Vortex Tube to Recover the Exhaust

Entezari, Sina | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52671 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Kazemzadeh Hanani, Siamak; Chitsaz, Eiman
  7. Abstract:
  8. In this research energy and exergy Balance has been studied for a turbocharged three-cylinder engine. Energy balance is a method based on the first law of thermodynamics and based on this method the control volume is selected on the engine and the input and output energies of the control volume are calculated. Exergy balance is also a method based on the second law of thermodynamics which achieves the amount of irreversibility and ability to convert useful work for different energies in the control volume. In the tests performed, the net output power, output exhaust energy, energy transferred to the cooling fluid and other energies, including convection and radiation heat transfer from the engine body, were calculated at different operating conditions that's mean at different Speeds and loads of engine. The results show that the highest efficiency of the first and second law of thermodynamics for this engine is 33.1% and 29.8%, respectively. Then we use a vortex tube to retrieve the exhaust energy from the engine. In this study, the hot exhaust of vortex Tube was used to heat the catalyst during cold engine start. For this purpose, the exhaust from the engine catalyst in the engine cold start is considered as the vortex tube input. The thermal performance and pressure drop within the vertex tube have been calculated for different hot-mass fraction. The result of this simulation is that the pressure drop within the vertex tube is between 255 and 266 kPa and the amount of hot exhaust vortex tube output energy is between 0.3 and 3.8 Kw
  9. Keywords:
  10. Internal Combustion Engines ; Vortex Tubes ; Exergy Analysis ; Spark Ignition Engines ; Cold Cranking ; Energy and Exergy Balance ; Exhaust Gases Recirculation

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